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TABLE 15 <br /> ESTIMATED INHALATION HAZARD FROM EXPOSURE TO SOIL <br /> US CAN-WELTY ROAD <br /> 35275 Welty Road <br /> Vernalis, California <br /> COPC Cs(mg/kg) Cair(mg/m3) RfDi Inhalation HQ <br /> BTEX <br /> Benzene 0.0050 1.61E-08 1.7E-02 6.0E-07 <br /> Toluene 0.033 7.38E-08 8.6E-02 5.5E-07 <br /> Eth lbenzene 3.3 4.39E-06 5.7E-01 4.9E-06 <br /> Total Xylenes 9.5 1.06E-05 2.0E-01 3.4E-05 <br /> PAHs <br /> Acenaphthene 0.00067 4.7E-10 6.0E-02 5.0E-09 <br /> Anthracene 0.11 2.0E-08 3.0E-01 4.4E-08 <br /> Benzo(a)anthracene 0.0061 3.1E-10 NA NA <br /> Benzo(a)pyrene 0.0063 3.2E-10 NA NA <br /> Benzo fluoranthene 0.013 6.5E-10 NA NA <br /> Benzo ,h,i e leve 0.0018 9.0E-11 NA NA <br /> Benzo k fluoranthene 0.00067 3.4E-11 NA NA <br /> Ch Bene 0.44 2.2E-08 NA NA <br /> Dibenz a,h anthracene 0.00067 3.4E-11 NA NA <br /> Fluoranthene 0.65 3.3E-08 NA NA <br /> Fluorene 0.6 2.1E-07 4.0E-02 3.4E-06 <br /> Indeno 1,2,3-c,d ene 0.00067 3.4E-11 NA NA <br /> Naphthalene 3.6 7.6E-06 2.6E-03 1.9E-03 <br /> Phenanthrene 2.3 1.2E-07 NA NA <br /> Pyrene 0.067 3.4E-09 3.0E-02 7.1E-08 <br /> Total Estimated Hazard: 1.9E-03 <br /> Equation: <br /> Inhalation HQ=(Cair/RfDi)x 0.639 <br /> Where: <br /> RfDi=the inhalation reference dose,mg/kg-day. <br /> Cair=concentration in air,mg/m3 <br /> HQ=hazard quotient <br /> Note:Using the PEA Manual,the value for Cair is estimated using Figures 2.5,2.6,and 2.7 for <br /> VOCs and Figure 2.8 for non-VOCs. <br /> Abbreviations: <br /> COPC=Constituent of potential concern <br /> mg/kg=Milligram per kilogram <br /> mg/m3=Milligram per cubic meter <br /> NA=Not applicable <br /> PAHs=Polynuclear aromatic hydrocarbons <br /> PEA=Preliminary Endangerment Assessment <br /> VOCs=Volatile organic compounds <br /> Equation Source: <br /> PEA Manual,Table 2.4. <br /> Page 1 of 1 SAIC <br />